GGU 314935-36 - C.H. Ostenfeld Nunatak (Cambrian of Greenland)

Where: Greenland (74.4° N, 22.8° W: paleocoordinates 30.5° S, 48.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Bastion Formation, Dyeran (515.3 - 511.2 Ma)

• SPECIFIC COMMENTS: Collection is from near the middle of the Bastion Formation. Lumped collections from same horizon, including GGU 314935-36.

•GENERAL COMMENTS: The Kloftelv Formation is overlain by the fossiliferous Bastion and Ella Island foramtions, both of middle Dyerian age (late Early Camrbian, equivalent of the Botomian). The Ella Island Formation (100 m thick) is mainlyy limestone and calcareous sandstone and is overlain by essentially unfossiliferous dolomites of the Hyolithus Creek and Dolomite Point formations, spanning the rest of the Cambrian Period.

• bed-level stratigraphic resolution

Environment/lithology: marine; shale

• The Bastion and Ella Island Formations from part of a thick succession of shallow-marine Proterozoic-Ordovician sediments deposited on the Laurentian shelf.
• Limestone and calcareous sandstone.

Size class: macrofossils

Collection methods: bulk, chemical, acetic, sieve,

• Rock samples were dissolve in buffered 10 percent acetic acid to retrieve acid-resistent microfossils. The resulting residues were sieved and the heavy mineral fraction separated using sodium polytungstate. All specimens are housed in the Geological Museum in Copenhagen (MGUH)

Primary reference: C. B. Skovsted and L.E. Holmer. 2005. Early Cambrian brachiopods from north-east Greenland. Palaeontology 48(2):325-345 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 49472: authorized by Austin Hendy, entered by Austin Hendy on 16.04.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for Brachiopoda. The residues of the acid-digested samples contain a well-preserved and diverse small shelly fauna including helcionellid molluscs, coelosclerites, lapworthellids, and problematic fossils. Add Gubanov et al. press and Skovsted in press (at the time of April, 2005) for complete fauna - references in current reference.
Lingulata
 Lingulida - Eoobolidae
Eoobolus priscus Poulsen 1932
Trilobita
  -
Trilobita indet. Walch 1771 trilobite
 Redlichiida - Wanneriidae
Wanneriidae indet. Hupé 1952 trilobite
 Hyolithelminthida - Hyolithellidae
Hyolithellus micans Billings 1871